전체적인 리팩토링

lib/kis/domestic-helpers.ts

@@ -328,6 +328,9 @@ export function nowHmsInKst() {
 }
 
 export function minutesForTimeframe(tf: DashboardChartTimeframe) {
+  if (tf === "5m") return 5;
+  if (tf === "10m") return 10;
+  if (tf === "15m") return 15;
   if (tf === "30m") return 30;
   if (tf === "1h") return 60;
   return 1;